I just played through this game for quite awhile and really enjoyed it.
My constructive feedback (if you want it!)
- Beyond creating new classes... I think some balancing of the classes should be done.
Current;y, I can beat any of the trials if I just dump all of my resources into the skeleton archers. Either the other classes should be buffed, or the archers should be nerfed. Probably the archers nerfed, honestly, because I can complete everything on a first time playthrough with just the archers.
- Right now, as you unlock different upgrades, the grouping gets mixed up. So, you'll have some archer upgrades and then the melee skeleton upgrades show up jumbled in the menu. Having each class grouped together would be helpful.
- Other idle games similar to this have a mechanic to sell the earlier bought items, etc. That might be an interesting mechanic here.
But other than those minor things, this was a really enjoyable game to play and I'm really impressed it was made so quickly. I think, with your other ... "spooky" themed game (Mercedes), you could potentially package things together (ala Cauldron) and have a pretty complete and deep game that I would definitely wishlist and want to purchase!